Disinfectant



Patented May 5,1925.-

, um'rso STA THOMAS H. H ALL,

No Drawing.

To all whom it may concern:

Be it known that I, THOMAS citizen of the United Stat Swarthmore, in the TES PATENT orlnca.

0F SW ARTHMORE. PENNSYLVANIA, ASSIGNOB IQ THE BARRETT COMPANY, A CORPORATION OF NEW RSEY.

msrit'rncrnur.

Application mea'nmh is, 1920. Serial No. 365,891.

H. Him, a' es residing at countyof belaware and State of Pennsylvania, have invented certain new and useful Improvements in Disinfectants, of whi ification.

This invention oh the following is a spechas for its object an improved disinfectant or germicide which can be produced in large quantities at relatively small cost, and which shall possess a powerful effect as a microbicide even when used in small quantities. I

It is well known that the phenolic derivatives of benzol and its products are active bacteriocides.

the phenolic derlvatives of well known that the condensed ring naphthalene show properties. This fact that I alkyl substitution It is also hydrocarbons such as similar bacteriocidal invention resides 1 111 the have discovered that the hydroxy derivatives-of other aromatic hydrocarbons,

to wit, diphenyl,

and its alkyl derivatives,

belonging to neither of these groups but containing two rings in direct combin power far above that shownof six carbon atoms each, ation, show bacteriocidal by the hydroxy derivatives of the other aromatic hydrocarbons previously describec belonging to this to be particularly ing purposes is orthohydroxydiphenyl, al-. though other hydroxy-derivatives of carbons having two benzene rings in The compound roup which I have found applicable for disinfecthydrocombination possess this property in a remarkable degree and can be used w1th beneficial results.

pared synthetically as previously in var These compounds may be prelias been described 1ous works.

the advantage over the common phenolic bacteriocides that on account of their much higher germicidal power they can be used in much greater dilution than the less powerful bacteriocides. tions the toxicity In these effective dilu of these substances is so greatly reduced that they are entirely inhuman organism, whereas the effective dilutions of phenol and its'related compounds are distinctly toxic. I have also found that in manufacture of the synthetic phenolic compounds such,

for example, as synthetic phenol, that there dlrect They possess ha e higher boiling points than the pheno 10 compounds themselves. Upon dlstilling the crude phenol, which may have been are obtained as by-products residues which synthetically produced by starting with ben- I zol and treating in well known ways, there are obtained residues-which have a very high dlsmfecting value many times greater than phenol or carbolic acid. These residues have been found to consist of a number of compounds some of which are derivatives of .diphenyl or dinaphthyl. Analysis has shown that a considerable portion of these residues is made up of o-hydroxydiphenyl be emulsified or dissolved, for example, in.

a mixture of hydrocarbon oil, water, and a; resin soap, a vegetable oil soap, an animal 011' soap or mixtures of two or more of these The mixture is soaps. thoroughly stirred so as to distribute the, ingredients uniformly and thereby form a homogeneous product. As a specific example of such a disinfectant, I may give the following: It is to be understood, however, that these proportions can be changed and also the relative proportion of ortho and para hydroxydiphenyl to each droxydiphenyl, and that the high other can be widely changed without departing-from'the spirit and scope of this inventlon as set forth in the claims. 1

Gms. Neutral hydrocarbon. 26

A mixture containing substantially 75% of ortho and 25% -of parahydroxydiphenyl- 26 Rosin 36 Caustic s o d a (1.3 specific gravity) 12 Then the disinfectant compounded according to the above formula, wastested by following the well known Rideal-Walker procedure, it was found to have a coefficient of 20 as is shown by the following table:

B. Typhosus, 24 hours broth culture at 37 C. Temperature 'of medication their residues in combination, and it appears 15 -18 C, s that thesexderivatives are effective in imparting the desirable and valuable disinfect- Time culture a! ed to mg properties to the solutrons or emulsions. a :1 a1 foctant subcultures These solutions or emulsions may be used sample J" pejriodgrttiemlh in the usual ways for dlsmfectant purposes 2, 5 7% 10 12V 15 and even when they are greatly d luted they A /2 are found to possess a strong disinfecting power. lf I I I I I I. Disinfectants made in accordance with ,j I i I I this invention have the advantage that they Phenol IIII 1:00 possess the characteristic of being odorless H M and practically tasteless in the dilution in a 1800 which they are used. These factors render Rideal-Walker coeflicient 20.

When o-hydroxydiphenyl alone is used in making the disinfectant, it may be dissolved in ordinary solvents such as alcohol, acetone, etc., and thus avoid the necessity of employing an oil and a soap. The p-hydroxydiphenyl alone is not readily emulsified by a soap solution and it is diflicultly soluble in most of the ordinary solvents. it is mixed with 0-11 'droxydiphenyl it can be made up into an emulsion with oil and a sea and a satisfactory disinfectant with a hi li tained.

A convenient method of preparing the disinfectant from any one or a mixture of these compounds is to dissolve the compound or the mixture in a suitable nonaqueous solvent such as alcohol, or to incorporate the compound or mixture in an en1ulsion consisting of an oil and a soap.

\Vhile the residues resulting from the distillation of the synthetically prepared crude phenol are a prolific source from which the materials for the improved disinfectant may be obtained, these mate-rials may be obtained from other sources such as residues obtained in the distillation of crude beta naphthol, resorcinol, and other synthetic phenolic bodies, or they may be made synthetically as above stated. These residues contain hydroxyl derivatives of compounds which have at least two benzene rings or But when Rideal-Valker coefficient is thus obthem valuable for disinfection of the mucous membrane of the human organism and even for internal disinfection, as, for example, intestinal disinfection.

he invention may be again illustrated by the following formula, as an example: I y Parts. Hydroxydiphenyh 35 Neutral hydrocarbon oil 27 Rice oil 27 Caustic soda solution (1.3

sp. gr.) 11

A disinfectant made in this way when subjected to the well known Rideal-VValker test showed a coeflicient of 35 as compared to the disinfecting power of phenol.

claim:

1. As a new article of manufacture, a disinfectant containing a hydroxy derivative of a hydrocarbon containing two rings of six carbon atoms each in direct combination mixed with a hydrocarbon oil and soap.

2. As a new article of manufacture, a disinfectant containing a hydroxy derivative ofv diphenyl mixed with a hydrocarbon oil and soap.

3. As a new article of manufacture, a disinfectant containing ortho-hydroxy diphenyl mixed with a hydrocarbon oil and soap.

In testimony whereof I afifir' my signature.

THOMAS H. HALL. 

